Malicious PDF — malware analysis report

Static analysis result for SHA-256 29dc53f6c4c95481…

MALICIOUS

PDF

160.5 KB Created: 2021-02-27 19:37:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ea49560d131fe02e72ae7dd8f2950931 SHA-1: 2e3241dc1783db26a1af07348da10e6985c6c627 SHA-256: 29dc53f6c4c954812405d2d709dca3bd255c422c96151bf173411fe768c1eedd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://lozipotod.ru/strik?utm_term=ikea+bed+frame+replacement+parts PDF link annotation
    • https://cdn.sqhk.co/kasavakujosi/hihP60Q/ravuxab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504791/normal_600d89c7ba38e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502268/normal_602afd4813252.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452392/normal_5fd3aa1150c77.pdfIn PDF document text
    • http://lodomujimujug.mywebcommunity.org/kapodip.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/31033886509.pdfIn PDF document text
    • http://topukovatawosu.sportsontheweb.net/how_many_ounces_is_a_medium_sized_sweet_potato.pdfIn PDF document text
    • http://obzorov.site/rigiwiwolupanikaxija8agod.pdfIn PDF document text
    • http://asta-stroy.ru/1927215017279t5d.pdfIn PDF document text
    • http://woxijakuzadajew.getenjoyment.net/lafuxilexotiw.pdfIn PDF document text
    • https://cdn.sqhk.co/nedabuke/iiYgjOf/98263672777.pdfIn PDF document text
    • http://reetodo.online/549330403326j0ly.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/jebupiditiwesapajika.pdfIn PDF document text
    • http://justiciaforjustice.com/how_to_make_an_origami_box_with_printer_paperqjd4w.pdfIn PDF document text
    • http://dakisemakegag.sportsontheweb.net/information_technology_administrator_salary_texas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452398/normal_5fea385862b97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427828/normal_603a15cb148f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000237ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x237FF 5440 bytes
SHA-256: dc3f715692ccf029ffe49764c27ea9be2c6925163a0d88d9e7e666a5955277cc
font_01_sfnt_off00024a6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24A6F 12760 bytes
SHA-256: 308a5493eaa4cbce44bc651a5e5bf8b637936f47f7b72055b1269b190da8cd11

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